Which formula gives the refractive index of second medium with respect to the first?

Correct option is C

The correct answer is (c) sin i / sin r.
The formula for the refractive index of the second medium with respect to the first medium is given by Snell's Law as:
n
Where:
· n is the refractive index of the second medium with respect to the first medium.
· i is the angle of incidence in the first medium.
· r is the angle of refraction in the second medium.
This formula expresses how light bends when it passes from one medium to another, depending on their refractive indices.
Information Booster:
· The refractive index determines how much light bends or changes direction when moving from one medium to another.
· A higher refractive index means that light slows down more in the second medium.
· Snell's Law is used to calculate the angle of refraction when light travels between different mediums like air, water, or glass.
· The refractive index can also be used to explain phenomena like total internal reflection.